The patch titled
gpiolib: add drivers/gpio directory
has been added to the -mm tree. Its filename is
gpiolib-add-drivers-gpio-directory.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: gpiolib: add drivers/gpio directory
From: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Add an empty drivers/gpio directory for gpiolib infrastructure and GPIO
expanders. It will be populated by later patches.
This won't be the only place to hold such gpio_chip code. Many external chips
add a few GPIOs as secondary functionality (such as MFD drivers) and platform
code frequently needs to closely integrate GPIO and IRQ support.
This is placed *early* in the build/link sequence since it's common for other
drivers to depend on GPIOs to do their work, so they must be initialized early
in the device_initcall() sequence.
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Acked-by: Jean Delvare <khali@xxxxxxxxxxxx>
Cc: Eric Miao <eric.miao@xxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Philipp Zabel <philipp.zabel@xxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Ben Gardner <bgardner@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/Kconfig | 2 ++
drivers/Kconfig | 2 ++
drivers/Makefile | 1 +
drivers/gpio/Kconfig | 32 ++++++++++++++++++++++++++++++++
drivers/gpio/Makefile | 4 ++++
5 files changed, 41 insertions(+)
diff -puN arch/arm/Kconfig~gpiolib-add-drivers-gpio-directory arch/arm/Kconfig
--- a/arch/arm/Kconfig~gpiolib-add-drivers-gpio-directory
+++ a/arch/arm/Kconfig
@@ -1079,6 +1079,8 @@ source "drivers/i2c/Kconfig"
source "drivers/spi/Kconfig"
+source "drivers/gpio/Kconfig"
+
source "drivers/w1/Kconfig"
source "drivers/power/Kconfig"
diff -puN drivers/Kconfig~gpiolib-add-drivers-gpio-directory drivers/Kconfig
--- a/drivers/Kconfig~gpiolib-add-drivers-gpio-directory
+++ a/drivers/Kconfig
@@ -52,6 +52,8 @@ source "drivers/i2c/Kconfig"
source "drivers/spi/Kconfig"
+source "drivers/gpio/Kconfig"
+
source "drivers/w1/Kconfig"
source "drivers/power/Kconfig"
diff -puN drivers/Makefile~gpiolib-add-drivers-gpio-directory drivers/Makefile
--- a/drivers/Makefile~gpiolib-add-drivers-gpio-directory
+++ a/drivers/Makefile
@@ -5,6 +5,7 @@
# Rewritten to use lists instead of if-statements.
#
+obj-$(CONFIG_HAVE_GPIO_LIB) += gpio/
obj-$(CONFIG_PCI) += pci/
obj-$(CONFIG_PARISC) += parisc/
obj-$(CONFIG_RAPIDIO) += rapidio/
diff -puN /dev/null drivers/gpio/Kconfig
--- /dev/null
+++ a/drivers/gpio/Kconfig
@@ -0,0 +1,32 @@
+#
+# GPIO infrastructure and expanders
+#
+
+config HAVE_GPIO_LIB
+ bool
+ help
+ Platforms select gpiolib if they use this infrastructure
+ for all their GPIOs, usually starting with ones integrated
+ into SOC processors.
+
+menu "GPIO Support"
+ depends on HAVE_GPIO_LIB
+
+config DEBUG_GPIO
+ bool "Debug GPIO calls"
+ depends on DEBUG_KERNEL
+ help
+ Say Y here to add some extra checks and diagnostics to GPIO calls.
+ The checks help ensure that GPIOs have been properly initialized
+ before they are used and that sleeping calls aren not made from
+ nonsleeping contexts. They can make bitbanged serial protocols
+ slower. The diagnostics help catch the type of setup errors
+ that are most common when setting up new platforms or boards.
+
+# put expanders in the right section, in alphabetical order
+
+comment "I2C GPIO expanders:"
+
+comment "SPI GPIO expanders:"
+
+endmenu
diff -puN /dev/null drivers/gpio/Makefile
--- /dev/null
+++ a/drivers/gpio/Makefile
@@ -0,0 +1,4 @@
+# gpio support: dedicated expander chips, etc
+
+ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
+
_
Patches currently in -mm which might be from dbrownell@xxxxxxxxxxxxxxxxxxxxx are
spi_bitbang-always-grab-lock-with-irqs-blocked.patch
git-arm.patch
git-input.patch
backlight-omap1-backlight-driver.patch
pcmcia-stop-updating-dev-powerpower_state.patch
at91_cf-use-generic-gpio-calls.patch
remove-obsolete-sys-devices-power-state-docs.patch
spi-core-stop-updating-dev-powerpower_state.patch
atmel_spi-throughput-improvement.patch
atmel_spi-chain-dma-transfers.patch
atmel_spi-chain-dma-transfers-update.patch
atmel_spi-fix-dmachain-oops-with-debug-enabled.patch
rtc-cmos-exports-nvram-in-sysfs.patch
rtc-cmos-alarm-acts-as-oneshot.patch
gpiolib-add-drivers-gpio-directory.patch
gpiolib-add-gpio-provider-infrastructure.patch
gpiolib-update-documentation-gpiotxt.patch
gpiolib-avr32-at32ap-platform-support.patch
gpiolib-pxa-platform-support.patch
gpiolib-pcf857x-i2c-gpio-expander-support.patch
gpiolib-mcp23s08-spi-gpio-expander-support.patch
gpiolib-pca9539-i2c-gpio-expander-support.patch
gpiolib-deprecate-obsolete-pca9539-driver.patch
usb-net2280-cant-have-a-function-called-show_registers.patch
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